Half A Muffin Top

So I have lost 40lbs since I've had my daughter, and that was 2 years ago. I am now 5'2 and 121lbs, and I have tried all the crunches, sit ups, all types of exercise and diet to help me get rid of that weird half stretch marked, wrinkly stomach. I call it my "half muffin top" because it's only in the front ha.

I've heard using vitamin E lotion/creme is supposed to be great, but haven't ventured there yet!

Any suggestions on how to get rid of that half a muffin top?
Sorry for the albino stomach and neck breaking first picture.

It looks like loose skin. You don't look fat or anything. Just looks like excess skin. Have you tried doing crunches but twist your sides when you cone up? Like do them diagonally? Bc those will tighten your whole core since you are going from side to side.

Quoting Kimberlea Boggs:" It looks like loose skin. You don't look fat or anything. Just looks like excess skin. Have you tried ... [snip!] ... sides when you cone up? Like do them diagonally? Bc those will tighten your whole core since you are going from side to side."

I have tried the side crunches, those just were not my main priority ha... I shall add them to my routine =)